Printer s quoin



(No Model.)

H. A. HEMPEL. PRINTERS QUOIN.

No. 443,280. Patented Dec. 23, 1890.

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HENRY A. HEMPEL, OF GOTHA, FLORIDA, ASSIGNOR OF ONE-HALF TO JOSEPH A. DINGENS, OF BUFFALO, NEWV YORK.

PRINTERS QUOIN.

SPECIFICATION forming part of Letters Patent No. 443,280, dated December 23, 1890. Application filed July 28,1890- Serial No. 360,182. (No model.)

To all whom it may concern.-

Be it known that I, HENRY A. HEMPEL, a citizen of the United States, residing at Gotha, in the county of Orange and State of Florida, have invented a new and useful Improvement in Printers Quoins, of which the following is a specification.

This invention relates to that class of printers quoins which are made of metal, usually malleable cast-iron, and which are used in pairs. In Letters Patent of the United States No. 204,820, granted to myself and Joseph A. Dingens on the 11th day of June, 1878, a quoin of this kind is described, Which is provided with gear-racks on opposite sides of a central rib, so that two of these quoins can be placed in face-to-face contact with each other and can be tightened or released by means of a pinion-key inserted between two opposing gear-racks of the quoins. The quoin of this patent has gone into extensive use since the granting of said patent. Nevertheless printers are found occasionally who view all metallic quoins with suspicion, because the frictional resistance between the inclined faces of the quoins is less than in wooden quoins. If the quoins slip on their inclined faces, the form becomes loose and damage may result; and the object of my invention is to reduce the liability of the quoins to slip on their inclined faces.

In the accompanying drawings, Figure 1 represents a chase containing a form locked up with my improved quoins. Figs. 2 and 3 are face views of a pair of the quoins. Fig. at is a side elevation of apair of these quoins. Fig. 5 is an end elevation of one of these quoins. Fig. 6 is an end elevation of two of these quoins. Fig. 7 is a perspective view of one of these quoins. Fig. 8 is a side elevation of a pair of quoins containing my present improvement, but constructed to be locked by means of a shooting-stick and mallet instead of a pinion-key. Fig. 9 is a perspective view of one of these quoins.

Like letters of reference refer to like parts in the several figures.

A represents the chase; B, the form; C, the straight furniture placed next to the form, and D the quoins. a

Each quoin is provided 011 its face or inclined side with an inclined central rib or feather cl. Each quoin has at the butt or large end two lugs E, arranged on opposite sides of the central rib and projecting beyond the same, so that a groove is formed between the lugs in line with the rib. These lugs have inclined faces 6 e and are provided on their inner or opposing sides, within said groove, with teeth or projections f, extending from the inclined faces'of the lugs toward the bottom of the groove.

Each quoin is provided at its tip end with inclined faces g, arranged on opposite sides of the central rib and depressed below the same sufficiently to form bearings for the inclined faces of the lugs of the opposing quoin. The ribs of the two quoins need not come in contact with each other, but are preferably slightly separated, as represented in Fig. 4, to avoid the necessity of finishing their faces to form a close fit. lVhen so constructed each quoin bears with the inclined faces of its lugs against the inclined faces of the other quoin, whereby the wedging action is produced in driving the quoins, and the quoins of a pair are prevented from twisting on each other to an undue extent by the central rib of one quoin entering the groove between the lugs of the other quoin. This rib has, however, a limited lateral play in the groove, and is provided on its sides with corrugations or teeth which correspond with the teeth on the inner sides of the lugs, so that by a slight twist of one quoin on the other, which is permitted by the play of the rib in the groove, the corrugations or teeth on one side of the rib of one quoin will interlock with the teeth on one of the lugs of the other quoin and thereby offer additional resistance to the slipping of the quoins on their inclined faces.

The quoins represented in Figs. 1 to 7 are provided with gear-racks h on opposite sides of the central rib between the inclined faces and the lugs, so that a pinion-key can be inserted between the opposing geavracks of two quoins and the latter be tightened or released by turning the key.

In the quoins represented in Figs. 8 and 9 the gear-racks are omitted and the inclined I00 face is continued on each side of the central rib nearly to the lug, from which the inclined lace 1S separated by a deep recess 6 of such size that a shooting-stick can be inserted into the same for drivingthe quoin. It is obvious that these recesses may be omitted and that the qnoins can be driven by placing the shooting-stick against either end of the quoin.

The slight lateral or twisting movement of one quoin on the other, which is necessary to interlock the corrugated rib of one quoin with the tooth of the otherquoin, is produced by the pressure of the pinion-key or the shootingstick, which is applied more or less out of the central line of the quoin. One or more ribs or teeth may be formed in the groove on the innerside of each lug. In Fig. 7 each lug is provided with a single tooth, and in Fig. 9 with two teeth. I

By arranging the same inclined faces and locking devices on each side of the central rib each quoin can he used with either side up, which enables the quoin nearest the form to bepointed toward the bar of the chase against which the form rests, whereby the type are tightened inlocking the form.

I am aware that it is not new to provide one qnoin with serrations and the other with a locking-pawl. Such a construction is essentially dillferent from my invention, because it involves the use of a movable pawl, which requires to be released before the quoins can be moved backward. In my invention a fixed locking-tooth is employed, and this tooth is disengaged from the teeth of the opposing quoin by a slight lateral movement of one quoin on the other.

I claim as my invention 1. A pairof quoinshaving inclined contactfaces, one of said quoins being provided with a corrugated or toothed side and the other with a '[ixed tooth adapted to engage with the toothed side of the opposing qnoin by a slight lateral movement of one quoin on the other, substantially as set forth.

2. A quoin having a longitudinal rib provided with corrugated or toothed sides, inclined faces on opposite sides of said ribs, and lugs at its butt-end arranged on opposite sides of the rib and provided on their inner sides with teeth, substantially as set forth.

\Vitncss my hand this 21st day of July, 1890.

HENRY A. IIEMPEL.

'tl'itnesses:

(2. l Gnvnn, FRED. (J. HEYEH. 

